In this paper, we propose a vehicle antenna system on a conductive heat reflecting window. A slot antenna in a heatable vehicle glazing established between the heating bus bar, bus bar extension and the peripheral edge of an electrically conductive IR reflective coating. The antenna slot may be fed directly by a voltage source, a current source, or a coupled coplanar line at a position to excite both fundamental and higher order modes for multiband antenna applications. The slot antenna can be also established between split heating bus bars or heating bus bar extension to reduces heat loss and improve antenna efficiency. Multiple antennas can be integrated into the heatable glazing for multiband applications and/or diversity antenna systems. Results from simulation on the vehicle are compared with measurements.
